Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0a5bdc17e62b08f…

MALICIOUS

PDF

71.0 KB Created: 2020-12-01 11:49:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 3ca442398c6ad90ec1ee230fd834ff94 SHA-1: d5c8ec247690c5306c45876bd01088bd72e38a0c SHA-256: d0a5bdc17e62b08f1a25d9511feb09a48a1f1ac7cf860a55afd94c632584b190
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://traffine.ru/123?utm_term=warframe+excalibur+guide+deutsch PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4379984/normal_5fbc368240909.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457862/normal_5fa48b7e85da5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370275/normal_5fb427051e6f5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450639/normal_5fbfd14e4d52a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426572/normal_5f9b11ebf21dc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388814/normal_5fb9d0e05c9f3.pdfIn PDF document text
    • https://likosevatifipol.weebly.com/uploads/1/3/4/5/134584064/bipedaxivenuzufobux.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374374/normal_5f934599f31ba.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/divelatoxa/amaravathi_song_in_telugu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b051ebdf-ff3b-476e-a67f-fe0fe64e6d14/49827703731.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa6fe620-d2fd-4cc6-a683-1ca78b473f22/68442700256.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc18074be9b6939510f0b00/t/5fc5af253f75b1664398dddd/1606790950068/dummysprite_latest_version_apk_download.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d68d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD68D 5656 bytes
SHA-256: 9e1349d0468cade270eb5eac7ebe07f2af835eece53ebb880873c82ae591deca
font_01_sfnt_off0000e9ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9AE 10944 bytes
SHA-256: a7263c51c815e475783888db046dcf8958a097fa38444759b146a9c9c13b3f0b

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